Coffee machine



FIG. 1 is an oblique perspective view of the coffee machine;

FIG. 2 is a front view of the coffee machine, as shown in FIG. 1;

FIG. 3 is a right side view of the coffee machine;

FIG. 4 is a back view of the coffee machine;

FIG. 5 is a left side view of the coffee machine;

FIG. 6 is a top view of the coffee machine; and,

FIG. 7 is a bottom view of the coffee machine.

The ornamental design for a coffee machine, as shown and described.